from The Century Dictionary.
- noun A red or ocher-yellow mineral from Falun in Sweden, consisting of the hydrous sulphates of iron, magnesium, and calcium.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Min.) A hydrous sulphate of iron of a deep red color. It often occurs in botryoidal form.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun mineralogy A
hydrous magnesium sulfate mineral.
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